KR102202995B1 - Systems and methods for resource detection for sidelink operation - Google Patents

Abstract

According to certain embodiments, a method by a wireless device 210, 300 for resource sensing is provided. The method includes obtaining, from the network node 215, an indication of resources associated with the first resource pool. The first resource pool is for use in exceptional communication with other devices. A triggering event associated with signaling from a network node is identified. Based on the triggering event, the need for exceptional communication with other devices is determined. At least one resource is selected from the first resource pool, and a message is transmitted using at least one resource selected from the first resource pool.

Description

Systems and methods for resource detection for sidelink operation

<Priority>

This application claims the priority of PCT/CN2016/094209, filed on August 9, 2016 and entitled "Resource Sensing Procedures for Sidelink Operation", the disclosure of which is incorporated herein by reference.

<Technical field>

TECHNICAL FIELD The present disclosure relates generally to wireless communication, and more particularly to systems and methods for resource sensing for sidelink operation.

In Release 12, the LTE standard has been extended to support device-to-device (D2D) (specified as “sidelink”) features targeting both commercial and public safety applications. Some applications enabled by Rel-12 LTE include device discovery. Device discovery may enable a wireless device to detect the proximity of another device and associated application by broadcasting and detecting discovery messages carrying device and application identities. Another application consists of direct communication based on physical channels established directly between devices. In 3GPP, all of these applications are defined under Proximity Services (ProSe).

One of the potential extensions of the ProSe framework consists in the support of V2x communication, including any combination of direct communication between vehicles, pedestrians and infrastructure. 1 illustrates exemplary types of V2X communication. From an application point of view, V2X includes at least the following types of communication/services: vehicle to vehicle (V2V), vehicle to infrastructure (V2I), vehicle to pedestrian (V2P) and vehicle to network (V2N).

V2V covers communication between vehicles using V2V applications and is primarily broadcasting based. V2V can be realized through direct communication between devices in respective vehicles, or through an infrastructure such as a cellular network. An example of a V2V is the transmission of a cooperative awareness message (CAM) with vehicle status information (position, direction and speed, etc.), which may be sent periodically and repeatedly to other vehicles in close proximity. For example, the CAM can be transmitted every 100ms-1s. Another example is the transmission of a decentralized environmental notification message (DENM), which is an event-triggered message to alert vehicles. These two examples are taken from the ETSI Intelligent Transport Systems (ITS) specification of V2X applications that also specify the conditions under which messages are generated. A key characteristic of V2V applications is the stringent requirements for latency, which can range from 20ms for pre-collision warning messages to 100ms for other road safety services.

V2I includes communication between vehicles and roadside units (RSUs). RSU is a fixed transport infrastructure that communicates with nearby vehicles. An example of V2I is the transmission of speed notifications from the RSU to the vehicle. Other examples include transmission of cue information, risk of collision warnings and curve speed alerts. Because of the safety-related nature of V2I, the delay requirements for V2I are similar to those for V2V.

V2P includes communication between vulnerable road users such as pedestrians and vehicles using V2P applications. V2P typically occurs between separate vehicles and pedestrians either directly or through an infrastructure such as a cellular network.

V2N includes communication between the vehicle and a centralized application server or ITS traffic management center. This communication can use V2N applications over an infrastructure such as a cellular network. One example is a bad road condition alert that is sent to all vehicles over a large area. Another example is traffic flow optimization where a V2N application suggests speeds to vehicles and adjusts traffic lights. Thus, V2N messages can be controlled by a centralized entity such as a Traffic Management Center, for example, and can be provided to vehicles in a large geographic area rather than a small area. Also, unlike V2V/V2I, since V2N is meant to be used for non-safety purposes, the latency requirements for V2N are further relaxed. For example, in V2N, a latency requirement of 1s is typically considered.

V2x communication, if available, may utilize network infrastructure. However, even when network coverage is insufficient, at least basic V2x connection should be possible. Providing an LTE-based V2x interface can be economically advantageous due to the economies of scale of LTE. In addition, the V2X interface can more closely integrate vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) and vehicle-to-vehicle (V2V) communications compared to using dedicated V2x technology. There are research projects and field tests of connected vehicles in various countries or regions, including projects based on the use of existing cellular infrastructure.

V2x communication can carry both non-secure and secure information, where each of the applications and services can be associated with a specific set of requirements. These sets of requirements may be related to, for example, latency, reliability, capacity or other suitable requirements.

Sidelink transmissions, also known as D2D or ProSe, are carried over the so-called PC5 interface in the cellular spectrum. Sidelink transmissions have been standardized in 3GPP after Release 12. In particular, two different modes of operation were specified in 3GPP Release 12. In one mode (mode-1), the wireless device in the RRC_CONNECTED mode requests D2D resources, and the eNB grants them through PDCCH (DCI5) or through dedicated signaling. In another mode (mode-2), the wireless device transmits from the pool of available resources provided in the broadcast by the eNB through SIB signaling for transmissions on carriers other than the PCell or through dedicated signaling for transmission on the PCell. Voluntarily select resources for Therefore, unlike the first operation mode, the second operation mode may be performed by wireless devices of RRC_IDLE.

In Release 14, the use of sidelinks was extended to the V2x domain. The design of the sidelink physical layer in Release 12 was dictated by the assumption that the amount of wireless devices competing for the same physical resources in the spectrum to carry voice packets for MCPTT traffic was small and mobility was low. On the other hand, in V2x, the sidelink must be able to cope with the scenario of higher load. Hundreds of cars could potentially compete for physical resources, for example. In V2X, the sidelink carries V2x messages (CAM, DNEM) triggered by time/event, and provides high mobility. For these reasons, 3GPP has discussed possible enhancements to the sidelink physical layer.

One such enhancement is the introduction of channel sensing. Unlike random resource selection, which is the basis of Release 12 and Release 13 ProSe communication, in V2V, wireless devices continuously sense channels and search for resources in different parts of the spectrum with less interference. The purpose of this detection is to limit collisions between wireless devices.

In 3GPP, two types of detection were considered. The first type is sensing based on received power. In particular, the wireless device measures the received energy for specific radio resources. Based on these measurements, the wireless device can determine whether or not the radio resources are considered to be in use by some other wireless device (i.e.,'busy') (i.e.,'idle'). have. As another example, the wireless device can use the measurements to estimate whether the transmitter is far away or near. For example, if the signal is weak, the transmitter may be far away, if the signal is strong, it may be nearby.

The second type of sensing is sensing based on packet contents. Using this type of sensing, the wireless device receives the packet and decodes it. Based on the information extracted from the packet, the wireless device can acquire some knowledge about the utilization of radio resources. For example, by reading a scheduling assignment (SA) packet or receiving sidelink control information (SCI), the wireless device can determine which radio resources expect data transmissions and the transmitter's priority. You can see what the ranking level is. As another example, by reading the data packet, the wireless device can know the position of the transmitter, the ID of the transmitter, the type of the transmitter, or some other information about the transmitter.

Wireless device mobility may be supported for wireless devices using sidelink resources. When such a wireless device is handed over, sidelink resources configured by its serving cell may be included by the source eNB in its "RRC context", and may be signaled to the target eNB of the X2 HANDOVER REQUEST message. The RRC context may be defined as an RRC Context IE by 3GPP TS 36.423 and TS 36.331. If the target cell can allocate the same set of radio resources to the wireless device, the wireless device can avoid losing the PC5 connection, thus minimizing sidelink service interruption due to handover in any case.

In addition, the ProSe protocol defines techniques that minimize the effect of radio link failures (RLF). During RLF, the wireless device may temporarily disconnect the connection to the cell to which it is connected. This can be particularly detrimental if the wireless device is configured with sidelink mode-1 operations because during the RLF the wireless device cannot receive new sidelink grants from the eNB. Thus, during the entire duration of the A3 event as defined in TS 36.311, the wireless device cannot use the sidelink. This can be very undesirable in the case of mission critical applications. To alleviate this problem, a new pool has been introduced that can be referred to as an exceptional pool in the 3GPP specification. Since this pool is provided by the eNB in broadcast signaling and must be used when the wireless device enters the RLF, sidelink service interruption in the RLF is minimized. This pool may also be used during the RRC re-establishment phase when T301 is active. The exception pool may not be limited to RLF applications only. Instead, they may be used in handovers to reduce service interruptions, for example.

The nature of V2X traffic requires more accurate resource selection steps other than pure random selection specific to Release 12 ProSe communication. One such power is the sense that the wireless device first senses the medium and needs to measure the quality of the channel before transmitting. Resource selection can consider such detection by giving priority to selection of corresponding physical resources determined to be less subject to interference. In order to be practically effective, this detection procedure must be performed for a specific amount of time, on the order of hundreds of milliseconds or even seconds. Therefore, it affects service disruption that cannot be ignored. To alleviate this problem, the Release 14 sidelink design assumes that the communication pool is continuously sensed by the wireless device. However, in the case of exceptional pool use, continuous detection may not be possible.

Because the exceptional pool is used only in exceptional cases, such as RLF, to minimize service disruption, a detection procedure that may take several seconds can be detrimental in the case of mission-critical services. For example, the detection procedure can be detrimental in the case of V2V traffic safety services. Also, by the time the wireless device has finished detecting the exceptional pool (probably a few seconds), the RLF event may already be over, offsetting the benefits of the RLF.

In order to solve the above-described problems with existing solutions, resource sensing systems and methods for sidelink operation are disclosed.

According to certain embodiments, a method by a wireless device for resource sensing is provided. The method includes obtaining, from a network node, an indication of resources associated with a first resource pool. The first resource pool is for use in exceptional communication with other devices. A triggering event associated with signaling from a network node is identified. Based on the triggering event, the need for exceptional communication with other devices is determined. At least one resource is selected from the first resource pool, and a message is transmitted using at least one resource selected from the first resource pool.

According to certain embodiments, a wireless device is provided for resource sensing. The wireless device includes a non-transitory computer-readable medium containing instructions, and processing circuitry configured to execute instructions that cause the wireless device to obtain an indication of resources associated with a first resource pool from a network node. The first resource pool is for use in exceptional communication with other devices. A triggering event associated with signaling from a network node is identified. Based on the triggering event, the need for exceptional communication with other devices is determined. At least one resource is selected from the first resource pool, and a message is transmitted using at least one resource selected from the first resource pool.

Certain embodiments of the present disclosure may provide one or more technical advantages. For example, certain embodiments may eliminate service interruption due to a sensing operation when a wireless device starts to use radio resources belonging to a specific set of radio resources. These radio resources may include a set of resources used only in exceptional cases such as handover, RLF, loss of synchronization or other exceptional cases.

Other advantages may be readily apparent to one of ordinary skill in the art. Certain embodiments may not have any of the mentioned advantages, and may have some or all of them.

For a more complete understanding of the disclosed embodiments and their features and advantages, reference is now made to the following description taken in connection with the accompanying drawings.
1 illustrates exemplary types of V2X communication.
2 illustrates an exemplary network for resource sensing for sidelink operation according to certain embodiments.
3 illustrates another exemplary wireless device for resource sensing for sidelink operation according to certain embodiments.
4 illustrates an exemplary method by a wireless device for resource sensing for a sidelink operation according to certain embodiments.
5 illustrates another example virtual computing device for resource sensing for a sidelink operation according to certain embodiments.
6 illustrates another exemplary method for detecting resources for a sidelink operation according to certain embodiments.
7 illustrates another exemplary method for detecting resources for a sidelink operation according to certain embodiments.
8 illustrates another exemplary method for resource detection for a sidelink operation according to certain embodiments.
9 illustrates another exemplary method for detecting resources for a sidelink operation according to certain embodiments.
10 illustrates another exemplary network node for providing resource information for resource detection for a sidelink operation according to certain embodiments.
11 illustrates an exemplary method by a network node for providing resource information for resource detection for a sidelink operation according to certain embodiments.
12 illustrates an exemplary virtual computing device for resource sensing for a sidelink operation according to a specific embodiment.
13 illustrates an exemplary radio network controller or core network node according to certain embodiments.

Hereinafter, some of the embodiments considered in the present specification will be described in more detail with reference to the accompanying drawings. For example, certain embodiments are described in FIGS. 1 to 13 of the drawings, and similar reference numerals are used for similar and corresponding parts of the various drawings. However, other embodiments are also included within the scope of the present disclosure, and the present invention should not be construed as being limited only to the embodiments described herein, rather, these embodiments are to those skilled in the art. It is provided by way of example to convey the scope of the inventive concept. Like numbers refer to like elements throughout the description.

According to certain embodiments, methods and systems are proposed for sensing a specific radio resource or set of resources while minimizing service interruption due to an associated sensing procedure. Systems and methods are described in the context of providing V2X/ITS services over a mobile wireless network using a sidelink, but the systems and methods have similar characteristics while providing any radio access to any radio access including 5G/NR. The same can be applied to other contexts such as traffic.

It is to be noted that any feature of any of the embodiments disclosed herein may be applied to any other embodiment where appropriate. Similarly, any advantage of any of the embodiments may apply to other embodiments, and vice versa. Other objects, features, and advantages of the appended embodiments will become apparent from the following description.

In general, all terms used in this specification should be interpreted according to their ordinary meaning in the art, unless explicitly defined otherwise in the specification. All references to “element, device, component, means, step, etc.” are openly referenced to at least one instance of an element, device, component, means, step, etc., unless explicitly stated otherwise. It must be interpreted. The steps of any method disclosed herein need not be performed in the exact order disclosed, unless explicitly stated.

Illustrative examples for resource detection for sidelink operation will now be described. For simplicity, examples will include references to any of the features numbered below.

1.According to certain embodiments, the set of events may trigger detection of a radio environment by the wireless device, where the radio environment may be a set of specific physical radio resources, e.g., a pool of resources. . The set of radio resources may be provided by the network node in dedicated signaling, such as a handover command, for example. In other embodiments, the set of radio resources may be provided via broadcasting signaling or may be preconfigured in the wireless device. These physical radio resources may be a set of radio resources belonging to a pool B different from the pool A currently used by the wireless device. For example, in a specific embodiment, the resources of Pool B,

• Exceptional resources that are used differently from the resources of Pool A under certain conditions, such as handover, RLF, out-of-sync, out-of-coverage or other conditions;

A set of resources selected for better quality than the resources of Pool A, e.g., higher reference signal received power (RSRP), less congestion, etc.;

A set of resources used in certain geographic areas (eg, areas in which the wireless device is currently located) that can be identified by geographic coordinates or by zone identities or by radio coverage.

It can be composed of.

2. According to certain embodiments, the set of events may trigger the release of detection of the radio environment by the wireless device.

3. According to certain embodiments, a wireless device using one exemplary autonomous radio resource selection protocol may be required to complete at least one sensing period to select resources.

4. According to certain embodiments, a wireless device using another exemplary autonomous radio resource selection protocol may not be required to complete at least one sensing period to select resources.

5. According to certain embodiments using the centralized radio resource selection protocol, the third scheduler node may control the transmission of the wireless device.

6. According to certain embodiments, a set of conditions may be provided for determining whether sufficient sensing has been achieved by the wireless device to perform autonomous resource selection.

In the first exemplary embodiment, the wireless device performs the following steps.

When one of the triggering conditions of (1) is detected, starting detection of the radio environment.

Determining that autonomous radio resource selection is required by the wireless device to perform the transmission. This may be the result of the wireless device switching from centralized resource selection (5) to autonomous resource selection based on a procedure associated with the so-called "exceptional case" (but not necessarily). For example, this could be triggered by counters associated by RLF in case the connection to the network is lost during handover, or simply in response to the wireless device changing the sidelink transmission pool from pool A to pool B. have.

· Determining whether condition (6) is satisfied.

If condition (6) is satisfied, performing autonomous radio resource selection according to (4).

Optionally, when the triggerings of (2) are completed, stopping the detection operation.

In another example, the wireless device can perform the above steps. However, if condition (6) is not satisfied, the wireless device can avoid transmitting until condition (6) is satisfied. After condition (6) is performed, the wireless device may perform autonomous radio resource selection according to (3).

In another example, if condition (6) is not satisfied, the wireless device may perform autonomous radio resource selection according to (4) until condition (6) is satisfied. If condition (6) is satisfied, the wireless device can perform autonomous radio resource selection according to (3).

According to certain embodiments, various events may trigger detection of a radio environment. Examples of such events may include, for example, configuration of mode-1 (NW/eNB-controlled scheduling) operation in the wireless device by higher layers. Another exemplary event may include sending sidelinkUEInformation to the network node to request mode-1 resources. Another exemplary event may include receiving an authorization (eg, sidelink authorization on PDCCH or RRC) from a wireless device that allows use of radio resources. Another exemplary event may include, for example, a measurement report for a network node, such as event (3) discussed above. This can handle the case where the wireless device needs to perform a handover. Other examples of events include one or more out-of-sync indications detected by the wireless device, detection of RLF, reception at the wireless device of signaling associated with a handover command, e.g., pool B is better than pool A. It may include an event triggering a change from pool A to pool B of the sending pool, such as when having RSRP or when pool A is less congested than pool B, detection of out-of-coverage and UE location. For example, if the wireless device moves from a geographic area or zone associated with pool A to another geographic area or zone associated with pool B, an event may be triggered. In this case, sensing of the resources of Pool B may be initiated when the wireless device is located less than a certain configurable distance from the boundary or center of the geographic area or zone associated with Pool B.

According to certain embodiments, these triggering events ensure that the battery consumption of the wireless device is limited because the detection of the radio environment is performed only when the events are triggered. In other embodiments, the wireless device simply initiates detection of the radio environment upon detecting the presence of certain physical resources, e.g., exceptional pools, in dedicated or broadcasting signaling, without necessarily waiting for the triggering of the events. I can.

The sensing procedure and related parameters, such as the duration of the sensing procedure, resources to be monitored and/or other parameters, may be different for different triggering events and different radio environments. For simplicity, in the following embodiments and examples, it is possible to consider the case where pool A is a normal communication pool and pool B is an exceptional pool. However, in the following embodiments, both Pool A and Pool B are under different radio conditions such as RSRP, congestion, handover, RLF, out-of-sync, out-of-coverage or other conditions. It can be generalized to the case of normal communication pools used.

According to certain embodiments, different rules may be envisioned for terminating the detection procedure. For example, according to a specific embodiment, in the case of an exceptional pool (i.e., pool B) or while performing exceptional transmissions or abnormal transmissions or communications, in general, the network node It is possible to configure a communication pool (i.e. pool A) and a shorter sensing duration than for transmissions. Possible sensing duration values may range from 0s (ie no sensing is performed) to a maximum value. In another embodiment, sensing may be performed until certain events occur.

In certain embodiments, for example, one such option is timer-based sensing. In the case of timer-based sensing, sensing may be initiated by a specific event, such as any of those discussed herein, and sensing may be terminated upon expiration of the configured timer. Possible sensing duration values may range from 0s (ie no sensing is performed) to a maximum value. In a specific embodiment, when one of the events is triggered, a new detection may be performed. In another embodiment, the sense timer may be restarted.

According to certain embodiments, the maximum value may be different for different events. For example, when detection of a radio environment (ie, an exceptional resource pool) is initiated after RLF, the maximum value may be smaller than T311, which is the maximum duration of RLF before the wireless device becomes idle. For example, if the detection of the radio environment is related to the exceptional pool used for handover, if detection is initiated after triggering a measurement report (e.g., a few seconds) or after receiving a handover command, the maximum May vary (eg, the maximum value may be less than T304, which is the maximum duration of the handover procedure before the wireless device initiates connection re-establishment).

In another exemplary embodiment, the sensing procedure may be initiated by any of the events listed herein and then stopped after the particular event has been triggered. According to certain embodiments, for example, if the event triggering the detection is a measurement report, the detection may continue until a handover is acknowledged by the network. Upon receipt of the handover command, if the radio environment is freely sensed, the wireless device can start transmitting on the most appropriately sensed resources. If the handover command is not received within a specific time, transmission through the detected radio environment may not be performed, and detection may be stopped until a new event triggers detection of the radio environment. In certain embodiments, for example, sensing may last for the entire duration of the sensing period, or until a certain amount of reports are sent by the wireless device.

In another exemplary embodiment, if the event triggering the detection is the detection of one or more out-of-sync indications by the wireless device, when N310 out-of-sync opportunities are detected and T310 is started, the detected radio environment Transmission over the channels can be initiated. If T310 is not started, detection may be terminated, and transmission may not be attempted through the detected radio environment. For example, if one or more in-sync indications are received by lower layers, sensing may end.

In another exemplary embodiment, if the event that triggered the detection is a UE location, the detection of the resource pool associated with a specific geographic area or zone may result in the wireless device being within a specific geographic area or zone or within a specific distance from such a geographical area or zone. Can last until located. Transmission over the sensed radio environment associated with the geographic area or zone may be initiated when the wireless device enters the geographic area or zone, and terminated when the wireless device leaves the geographic area or zone.

In yet another embodiment, the wireless device may be configured to skip detection of the radio environment and perform random selection of radio resources in the pool. For example, when the detection duration is set to 0s, the wireless device may perform random selection of radio resources. Radio environment detection may not be performed for resource selection.

According to another embodiment, when a mixture of resource selection mechanisms such as both random selection and resource selection based on detection is allowed in the same pool, for example, sensing capabilities may be impaired. Thus, in a specific embodiment, pools in which random selection is allowed and pools in which detection is allowed may not overlap. In another specific embodiment, in some resources, when both random selection and resource selection according to detection are allowed, the result of detection through the corresponding resources may be offset by a specific value. For example, the result may be offset by a percentage of the detection result to account for the likelihood that the corresponding resources may sometimes be interfered with by random selection.

According to another embodiment, when one of the triggering events occurs, the wireless device may perform both random selection and detection. For example, random selection may be performed until the detection procedure is completed. This implies, for example, that the timer for sensing described above has expired. When detection is complete, resource selection is performed according to a detection procedure rather than random. Thus, in this exemplary embodiment, the wireless device transmits based on the randomly selected transmit radio resources, while at the same time detecting a specific set of radio resources that may or may not be the same as those used for random selection. May be required to perform.

According to certain embodiments, the relevant sensing parameters may be provided as part of an exception/communication pool configuration provided by the network node in broadcast or dedicated signaling.

While the solutions described herein may be implemented in any suitable type of system using any suitable components, certain embodiments of the described solutions may be implemented in a wireless network such as the exemplary wireless communication network 200 illustrated in FIG. It can be implemented in a communication network. In the exemplary embodiment of FIG. 2, the wireless communication network 200 provides communication and other types of services for one or more wireless devices 210. In an exemplary embodiment, the wireless communication network 200 is one or more of the network nodes 215 and 215a that facilitate access of the wireless device to the wireless communication network 200 and/or use of the services provided thereby. Includes instances. For simplicity, FIG. 2 only shows a network 220, network nodes 215 and 215a and wireless device 210. However, it will be appreciated that the wireless communication network 200 may include any number of networks, network nodes, and wireless devices. Further, the wireless communication network 200 may include any additional elements suitable to support communication between the wireless devices 210 or between the wireless device 210 and another communication device, such as a landline telephone.

Network 220 is one or more IP networks, public switched telephone network (PSTN), packet data network, optical network, wide area network (WAN) to enable communication between devices. ), a local area network (LAN), a wireless local area network (WLAN), a wired network, a wireless network, a metropolitan area network, and other networks. According to certain embodiments, wireless network 200 may communicate wireless signals between wireless devices 210 or between wireless device 210 and another communication device, such as a network node 215. Wireless signals may include voice traffic, data traffic, control signals and/or any other suitable information. In some embodiments, the radio signal coverage area associated with the network node 215 may be referred to as a cell. In some embodiments, wireless devices 110 may have D2D capability. Thus, wireless devices 210 may receive signals from another wireless device 210 and/or transmit signals directly to another wireless device 210.

Wireless communication network 200 may represent any type of communication, telecommunication, data, cellular and/or radio network or other type of system. While certain embodiments may be described as being implemented in a long term evolution (LTE) network, the embodiments support any suitable communication standards and use any suitable components. It can be implemented in a communication system, and can be applied to any radio access technology (RAT) or multi-RAT systems in which a wireless device receives and/or transmits signals (e.g., data). . For example, various embodiments described herein are LTE, LTE-Advanced, LTE-U Universal Mobile Telecommunications System (UMTS), HSPA, Global System for Mobile Communications ( GSM), cdma2000, WiMax, WiFi, other suitable radio access technologies, or any suitable combination of one or more radio access technologies. Although certain embodiments may be described in the context of wireless transmissions in the downlink, the present disclosure contemplates that various embodiments are equally applicable in the uplink, and vice versa.

In certain embodiments, the wireless communication network 200 may be configured to operate according to certain standards or other types of predefined rules or procedures. Accordingly, certain embodiments of the wireless communication network 200 may include communication standards such as GSM, UMTS, LTE and/or other suitable 2G, 3G, 4G or 5G standards; Wireless local area network (WLAN) standards such as IEEE 802.11 standards; And/or any other suitable wireless communication standard, such as Worldwide Interoperability for Microwave Access (WiMax), Bluetooth, and/or ZigBee standards. The communication network may also support D2D or ProSe communication.

According to certain embodiments, the network node 215 includes a processor 225, a storage 230, an interface 235 and an antenna 240a. Similarly, the wireless device 210 includes a processor 245, storage 250, an interface 255, and an antenna 260a. These components may work together to provide network node 215 and/or wireless device 210 functionality, such as providing wireless connectivity in wireless communication network 200. In different embodiments, the wireless communication network 200 has a wireless connection whether through any number of wired or wireless networks, network nodes, base stations, controllers, wireless devices, relay stations, and/or wired connections. It may include any other components that facilitate or participate in the communication of data and/or signals, whether via.

As used herein, a "network node" is directly with the wireless device 210 and/or other equipment within the wireless communication network 200 that enables and/or provides wireless access to the wireless device 210. Or indirectly capable of communicating, configured to communicate, arranged to communicate and/or operable to communicate. Examples of network nodes 215 include, but are not limited to, access points (APs), particularly radio access points. A network node may represent base stations (BS) such as radio base stations. Specific examples of radio base stations include Node Bs and evolved Node B (eNB). Base stations may be classified based on the amount of coverage they provide (or, in other words, their transmit power level), and may hereinafter be referred to as femto base stations, pico base stations, micro base stations or macro base stations. A “network node” refers to one or more of a distributed radio base station, such as centralized digital units and/or a remote radio unit (RRU), sometimes referred to as a remote radio head (RRH). Or all) parts. These remote radio units may or may not be integrated with the antenna as an antenna integrated radio. Some of the distributed radio base stations may be referred to as nodes in a distributed antenna system (DAS). As a specific non-limiting example, the base station may be a repeater node or a repeater donor node that controls the repeater.

Additional examples of network nodes 215 include multi-standard radio (MSR) radio equipment (MSR BSs, etc.), radio network controllers (RNCs) or base station controllers. network controllers such as controllers (BSCs), base transceiver stations (BTS), transmission points, transmission nodes, multi-cell/multicast coordination entity (MCE)s, core network nodes (e.g., MSCs, MMEs), O&M nodes, OSS nodes, SON nodes, location nodes (e.g., E-SMLCs), and/ Or MDT. However, more generally, network nodes 215 enable and/or provide wireless device 210 access to wireless communication network 200, or have access to wireless communication network 200 ( 210) capable of providing some services to, enabling and providing, configured to enable and provide, and/or operable to enable and provide any suitable device (or group of devices).

As used herein, the term “radio node” is generally used to refer to both wireless devices 210 and network nodes 215, each of which has been described separately above.

As shown in FIG. 2, the network node 215 includes a processor 225, a storage 230, an interface 235, and an antenna 240a. These components are shown as single boxes located within a single, larger box. However, in practice, network node 215 may include a number of different physical components that make up a single illustrated component (e.g., interface 235 may include wires for wired connection and radio transceiver for wireless connection). It may include terminals for). As another example, network node 215 may be a virtual network node through which a number of different physically separate components interact to provide the functionality of network node 215. For example, processor 225 may include three separate processors located in three separate enclosures, where each processor is responsible for a different function for a particular instance of network node 215. Similarly, network node 215 may be comprised of a number of physically separate components (e.g., Node B component and RNC component, BTS component and BSC component, etc.), each of which has its own processor, storage And interface components. In certain scenarios where the network node 215 includes multiple separate components (eg, a BTS and BSC component), one or more of the individual components may be shared among multiple network nodes 215. For example, a single RNC can control multiple NodeBs. In this scenario, each unique Node B and BSC pair may be a separate network node 215. In some embodiments, network node 215 may be configured to support multiple radio access technologies (RATs). In some embodiments, some components may be duplicated. For example, network node 215 may include separate storage 203 for different RATs. Similarly, in some embodiments, some components may be reused. For example, the same antenna 240a may be shared by RATs.

Processor 225 may be a combination of one or more of a microprocessor, controller, microcontroller, central processing unit, digital signal processor, application specific integrated circuit, field programmable gate array, or any other suitable computing device, resource, or hardware, software, And/or a combination of encoded logic operable to provide network node 215 functionality alone or in conjunction with other network node 215 components such as storage 230. For example, the processor 225 may execute instructions stored in the storage 230. Such functionality may include providing the various wireless features discussed herein to a wireless device, such as wireless device 210, including any of the features or advantages disclosed herein.

Storage 230 can be used as permanent storage, solid state memory, remotely mounted memory, magnetic media, optical media, random access memory (RAM), read-only memory (ROM), removable media or any May include any form of volatile or nonvolatile computer readable memory including, but not limited to, other suitable local or remote memory components. Storage 230 may store any suitable instructions, data, or information, including software and encoded logic used by network node 215. Storage 230 may be used to store any calculations made by processor 225 and/or any data received via interface 235.

Interface 235 may be used for wired or wireless communication of signaling and/or data between network node 215, network 220 and/or wireless device 210. For example, interface 235 performs any formatting, coding, or translation that may be necessary to enable network node 215 to transmit data to and receive data from network 220 over a wired connection. can do. Interface 235 may also include a radio transmitter and/or receiver that may be coupled to antenna 240a or a portion thereof. The radio may receive digital data to be transmitted to other network nodes 215 or wireless devices 210 via a wireless connection. The radio can convert digital data into a radio signal with appropriate channel and bandwidth parameters. The radio signal may be transmitted via antenna 240a to suitable recipients, such as, for example, wireless device 210.

Antenna 240a may be any type of antenna capable of wirelessly transmitting and receiving data and/or signals. In some embodiments, antenna 240a may include one or more omni-directional, sector or panel antennas operable to transmit/receive radio signals between 2 GHz and 66 GHz, for example. An omni-directional antenna can be used to transmit/receive radio signals in any direction, a sector antenna can be used to transmit/receive radio signals from devices within a specific area, and a panel antenna can be used to transmit/receive radio signals in a relatively straight line. It may be a line of sight antenna used to transmit/receive signals.

As used herein, a “wireless device” is capable of wirelessly communicating with, configured to communicate, arranged to communicate, and/or operable to communicate with a network node 215 and/or other wireless device 210. Refers to a device. Communicating wirelessly may include transmitting and/or receiving wireless signals using electromagnetic signals, radio waves, infrared signals, and/or other types of signals suitable for conveying information through the atmosphere. In certain embodiments, wireless devices may be configured to transmit and/or receive information without direct human interaction. For example, the wireless device may be designed to transmit information to the network 220 according to a predetermined schedule, when triggered by an internal or external event, or in response to a request from the network 220.

In general, wireless device 210 may represent any device capable of, configured for, arranged for, and/or operable for wireless communication, eg, radio communication devices. Examples of wireless devices 210 include wireless endpoints, mobile stations, mobile phones, wireless local loop phones, smart phones, user equipment, desktop computers, personal digital assistants (PDAs), cell phones, tablets, laptops, network nodes 215 ), and/or other wireless devices 210, and/or VoIP telephones or handsets capable of transmitting data and/or signals to and receiving data and/or signals therefrom. Additional examples include sensors, modems, wireless cameras, wireless enabled tablet computers, machine-type-communication (MTC) devices/machine-to-machine (M2M) devices, laptop-embedded equipment. (laptop-embedded equipment) (LEE), laptop-mounted equipment (LME), USB dongles, wireless customer-premises equipment (CPE), D2D capable devices, or It includes other devices capable of providing wireless communication.

In some embodiments, the wireless device 210 may be referred to as a UE, station (STA), device, or terminal. Also, in some embodiments, the general term “radio network node” (or simply “network node”) is used. It can be any kind of network node, which can be a Node B, a base station (BS), a multi-standard radio (MSR) radio node such as an MSR BS, an eNode B, a network controller, a radio network controller (RNC). ), base station controller (BSC), repeater donor node that controls repeater, base transceiver station (BTS), access point (AP), transmit points, transmit nodes, RRU, RRH, distributed antenna system (DAS) nodes, core network node (e.g., MSC, MME, etc.), O&M, OSS, SON, location node (e.g. E-SMLC), MDT, or any suitable network node. can do. In certain exemplary embodiments, the wireless device 210 includes a third generation partnership project (3 ^rd Generation Partnership Project) (3GPP) for GSM, UMTS, LTE and / or 5G one or more communication published by 3GPP, such as the standard It can be configured to communicate according to standards. As used herein, “user equipment” or “WD” need not necessarily have “user” in the sense of a human user who owns and/or operates the associated device. Instead, the wireless device 210 may represent a device that is intended for sale to a human user or for operation by that user, but cannot initially be associated with a specific human user.

The wireless device 210 may support device-to-device (D2D) communication by implementing a 3GPP standard for sidelink communication, for example, and in this case may be referred to as a D2D communication device.

As another specific example, in the Internet of Things (IOT) scenario, the wireless device 210 performs monitoring and/or measurements, and the results of these monitoring and/or measurements are transferred to the other wireless device 210 and /Or may represent a machine or other device transmitting to the network node 215. In this case, the wireless device 210 may be a machine-to-machine (M2M) device, which may be referred to as a machine-type communication (MTC) device in the 3GPP context. As one specific example, the wireless device 210 may be a wireless device that implements the 3GPP narrow band internet of things (NB-IoT) standard. Specific examples of such machines or devices include sensors, power meters, metering devices such as industrial machines, or home or personal wearables such as, for example, refrigerators, televisions, watches, and other devices. These are personal devices. In other scenarios, the wireless device 210 may represent a vehicle or other equipment capable of monitoring and/or reporting its operating status or other functions associated with its operation.

The wireless device 210 described above may represent an endpoint of a wireless connection, in which case the device may be referred to as a wireless terminal. Further, the wireless device 210 described above may be mobile, in which case it may also be referred to as a mobile device or mobile terminal.

According to certain embodiments, as illustrated in FIG. 2, the wireless device 210 includes a processor 245, a storage 250, an interface 255 and an antenna 260a. Like the network node 215, the components of the wireless device 210 are shown as single boxes located within a single, larger box, but in practice, the wireless device 210 contains a number of different physical components that make up a single illustrated component. Can include. For example, storage 250 may include a number of separate microchips, and each microchip may represent a portion of the total storage capacity.

Processor 245 may be a combination of one or more of a microprocessor, controller, microcontroller, central processing unit, digital signal processor, application specific integrated circuit, field programmable gate array, or any other suitable computing device, resource, or hardware, software, And/or a combination of encoded logic operable to provide wireless device 210 functionality alone or in conjunction with other wireless device 210 components such as storage 2250. Such functionality may include providing a variety of wireless features, including any of the features or advantages disclosed herein.

Storage 250 includes persistent storage, solid state memory, remote mounted memory, magnetic media, optical media, random access memory (RAM), read-only memory (ROM), removable media, or any other suitable local or remote memory component. , But not limited thereto, may include any type of volatile or nonvolatile memory. Storage 250 may store any suitable instructions, data, or information, including software and encoded logic used by wireless device 210. Storage 250 may be used to store any calculations made by processor 245 and/or any data received via interface 255.

Interface 255 may be used for wireless communication of signaling and/or data between wireless device 210 and network node 215. For example, interface 255 does any formatting, coding, or translation that may be necessary to enable wireless device 210 to transmit data to and receive data from network node 215 over a wireless connection. Can be done. Interface 255 may also include a radio transmitter and/or receiver that may be coupled to antenna 260a or a portion thereof. The radio may receive digital data to be transmitted to the network node 215 through a wireless connection. The radio can convert digital data into a radio signal with appropriate channel and bandwidth parameters. The radio signal may be transmitted to the network node 215 via the antenna 260a, for example.

Antenna 260a may be any type of antenna capable of wirelessly transmitting and receiving data and/or signals. In some embodiments, antenna 260a may include one or more omni-directional, sector or panel antennas operable to transmit/receive radio signals between 2 GHz and 66 GHz, for example. In certain alternative embodiments, the wireless device 210 may not include an antenna 260a. Instead, antenna 260a may be separate from wireless device 210 and connected to wireless device 210 via an interface or port. For simplicity, antenna 260a may be considered a part of interface 255 to the extent that a radio signal is used.

In certain embodiments, network nodes 215 may interface with a radio network controller (not shown in FIG. 2). The radio network controller may control the network nodes 215 and may provide specific radio resource management functions, mobility management functions, and/or other suitable functions. In certain embodiments, the functions of the radio network controller may be included in the network node 215. The radio network controller can interface with the core network node. In certain embodiments, the radio network controller may interface with the core network node through an interconnection network such as network 220.

In some embodiments, the core network node may manage the establishment of communication sessions and various other functions for wireless devices 210. Wireless devices 210 may exchange specific signals with a core network node using a non-access stratum layer. In non-access stratum signaling, signals between wireless devices 210 and a core network node can be transparently passed through the radio access network. In certain embodiments, network nodes 215 may interface with one or more network nodes through an internode interface. For example, network nodes 215 and 215A may interface through an X2 interface.

3 illustrates another exemplary wireless device 300 for resource sensing for a sidelink operation according to certain embodiments. In a particular embodiment, the wireless device 300 is a UE. The wireless device 300 includes an antenna 305, a radio front-end circuit 310, a processing circuit 315, and a storage 330, which may include a computer-readable storage medium 330.

Antenna 305 may include one or more antennas or antenna arrays, and is configured to transmit and/or receive wireless signals. The antenna 305 is connected to the radio front-end circuit 310. In certain embodiments, the wireless device 300 may not include an antenna 305. Additionally or alternatively, antenna 305 may be separate from wireless device 300 and may be connected to wireless device 300 via an interface or port.

The radio front-end circuit 310 may include various filters and amplifiers, is connected to the antenna 305 and processing circuit 315, and conditions signals communicated between the antenna 305 and the processing circuit 315 Is configured to In certain alternative embodiments, the wireless device 300 may not include a radio front-end circuit 310. The processing circuit 315 may instead be connected to the antenna 305 without the radio front-end circuit 310.

The processing circuit 315 may include one or more of a radio frequency (RF) transceiver circuit, a baseband processing circuit, and an application processing circuit. In some embodiments, the RF transceiver circuitry, baseband processing circuitry and application circuitry may be on separate chipsets. In certain embodiments, some or all of the baseband processing circuitry and application processing circuitry may be combined into one chipset, and the RF transceiver circuitry may be on a separate chipset. In still other embodiments, some or all of the RF transceiver circuitry and the baseband processing circuitry may be on the same chipset, and the application processing circuitry may be on separate chipsets. In still other embodiments, some or all of the RF transceiver circuitry, baseband processing circuitry, and application processing circuitry may be combined within the same chipset. The processing circuit 315 may be, for example, one or more central processing units (CPUs), one or more microprocessors, one or more application specific integrated circuits (ASICs), and/or one or more field programmable gate arrays. programmable gate array) (FPGA).

In certain embodiments, some or all of the functionality described herein as provided by the wireless device is a processing circuit 315 that executes instructions stored on storage 330 that may include a computer-readable storage medium. Can be provided by In certain embodiments, some or all of the functionality may be provided by processing circuitry 315 without executing instructions stored on a computer-readable medium, such as in a hard wired manner. In any of those specific embodiments, processing circuitry may be configured to perform the described function, regardless of whether or not executing instructions stored on a computer-readable storage medium. The benefits provided by this functionality are not limited to the processing circuit 315 alone or to other components of the wireless device 300, but are utilized by the wireless device as a whole, and/or end users and the wireless network in general.

Antenna 305, radio front-end circuit 310, and/or processing circuit 315 may be configured to perform any of the receiving operations described herein as being performed by a wireless device. Any information, data and/or signals may be received from a network node and/or other wireless device.

The processing circuit 315 can be configured to perform any of the determining operations described herein as being performed by the wireless device. The determination as performed by the processing circuit 315 may be, for example, converting the obtained information into other information, comparing the obtained information or the converted information with information stored in the wireless device, and/or By performing one or more operations based on the information or transformed information, it may include processing the information obtained by the processing circuit 315 and making a decision as a result of the processing.

Antenna 305, radio front-end circuit 310, and/or processing circuit 315 may be configured to perform any of the transmit operations described herein as being performed by a wireless device. Any information, data and/or signals may be transmitted to a network node and/or other wireless device.

Storage 330, which may include a computer-readable storage medium, generally includes an application including one or more of computer programs, software, logic, rules, codes, tables, and/or other instructions that may be executed by a processor. It is operable to store commands such as Examples of storage 330 include computer memory (e.g., random access memory (RAM) or read-only memory (ROM)), mass storage medium (e.g., hard disk), removable storage medium (e.g., compact A Compact Disk (CD) or Digital Video Disk (DVD)), and/or any other volatile that stores information, data, and/or instructions that can be used by the processing circuit 315 Or non-volatile, non-transitory computer-readable and/or computer-executable memory devices. In some embodiments, processing circuit 315 and storage 330 may be considered integrated.

The wireless device 300 may include input interfaces, devices and circuits, and output interfaces, devices and circuits. The input interfaces, devices and circuits are configured to allow input of information to the wireless device 300 and are coupled to the processing circuit 315 to enable the processing circuit 315 to process the input information. For example, input interfaces, devices and circuits may include a microphone, proximity or other sensor, keys/buttons, touch display, one or more cameras, USB ports, or other input elements. The output interfaces, devices and circuits are configured to allow the output of information from the wireless device 300 and are connected to the processing circuit 315 so that the processing circuit 315 can output information from the wireless device 300. To be. For example, the output interfaces, devices or circuits may include a speaker, a display, a vibration circuit, a USB port, a headphone interface, or other output elements. Using one or more input and output interfaces, devices, and circuits, the wireless device 300 can communicate with end users and/or the wireless network and can benefit from the functionality described herein.

The wireless device 300 may include a power source 335. The power source 335 may include a power management circuit. The power source 335 may receive power from a power supply included in the power source 335 or external to the power source 335. For example, the wireless device 300 may include a power source in the form of a battery or a battery pack connected to or integrated with the power source 335. Other types of power sources can also be used, such as photovoltaic devices. As a further example, the wireless device 300 may be connected to an external power source (such as an electrical outlet) through an input circuit or an interface such as an electrical cable, whereby the external power source supplies power to the power source 335. The power source 335 may be connected to the radio front-end circuit 310, the processing circuit 315 and/or the storage 330, as described herein in the wireless device 300 including the processing circuit 315. It may be configured to supply power to perform a function.

Alternative embodiments of the wireless device 300 may include additional components other than those shown in FIG. 3, which additional components support any of the functions described herein and/or the solutions described above. It may serve to provide certain aspects of the functionality of the wireless device, including any functionality required to do so. The wireless device 300 also includes multiple sets of processing circuitry 315 for different wireless technologies incorporated in the wireless device 300 such as, for example, GSM, WCDMA, LTE, NR, WiFi or Bluetooth wireless technologies. ), a storage 330, a radio circuit 310, and/or an antenna 305. These wireless technologies may be integrated into the same or different chipsets and other components within the wireless device 300.

Other embodiments of the wireless device 300 may include additional components other than those shown in FIG. 3, which additional components may include any and/or any additional functionality described herein (described above). (Including any functionality required to support the integrated solution) may serve to provide certain aspects of the functionality of the wireless device.

4 illustrates an exemplary method 400 by a wireless device for resource sensing for sidelink operation in accordance with certain embodiments. The method begins at step 402 in which a wireless device, such as wireless device 300, obtains an indication of resources associated with a first resource pool from a network node. In various embodiments, the indication may be obtained through a system information block or dedicated signaling. According to certain embodiments, the first resource pool is for use in abnormal communication.

According to a particular embodiment, the wireless device 300 may also obtain an indication of resources associated with the second resource pool for use in normal communication with another device. The wireless device 300 may select resources from the second resource pool during normal communication with another device. In a specific embodiment, the first resource pool may include a first plurality of resources that are a subset of the second plurality of resources in the first resource pool.

In step 404, the wireless device 300 identifies a triggering event associated with signaling from a network node. According to certain embodiments, the wireless device 300 may stop using the second resource pool for normal communication in response to identifying the triggering event.

According to certain embodiments, identifying the triggering event may include detecting a change in the communication session. In certain embodiments, for example, identifying the triggering event may include identifying that control of the wireless device is being handed over to the second network node. As another example, the triggering event may include a communication failure or a signaling failure from a network node. As another example, in a particular embodiment, identifying the triggering event may include determining that the first resource pool has a better RSRP than the second resource pool used for normal communication. In another embodiment, identifying the triggering event may include determining that the first resource pool is less congested than the second resource pool.

In step 406, the wireless device 300 determines the need for exceptional communication based on the triggering event. In certain embodiments, for example, the wireless device may determine that control of the wireless device 300 is to be handed over from a first network node to a second network node.

In step 408, the wireless device 300 selects at least one resource from the first resource pool. In a specific embodiment, the wireless device 300 may detect resources in at least one of the first resource pool and the second resource pool. When the detection of resources is completed, at least one resource may be selected based on the detection. However, when the detection of resources is not completed or is not successful, the wireless device 300 may randomly select at least a resource from the first resource pool. When the wireless device 300 does not have the time required to complete the detection of the resource, the detection may be considered incomplete or unsuccessful. Also, before the detection results can be used for resource selection, detection must be completed for a predetermined amount of time. As such, if sensing is not completed for at least 1 second, sensing may be considered incomplete or unsuccessful.

Upon completion of detection of the first resource pool or completion of the timer, the wireless device 300 may stop randomly selecting resources from the first resource pool. When the detection of resources of the first resource pool is completed, the wireless device 300 may start to select resources from the first resource pool based on the detection. In certain embodiments, for example, the wireless device 300 may select at least a second resource from the first resource pool based on the completed detection.

According to specific embodiments, the wireless device 300 may receive an eNodeB-scheduled resource configuration message from a network node, and detect resources in response to the eNodeB-scheduled resource configuration message. In a specific embodiment, for example, the wireless device 300 may receive a configuration message specifying the use of mode-1 operation, and while the wireless device 300 operates in mode-1, the first resource pool Resources can be detected. In another exemplary embodiment, the wireless device 300 may receive a configuration message specifying the use of the mode-3 operation, and while the wireless device 300 operates in mode-3, the resource of the first resource pool Can be detected.

In step 410, the wireless device transmits a message using at least one resource selected from the first resource pool.

In certain embodiments, a method for resource sensing for a sidelink operation as described above may be performed by a virtual computing device. 5 illustrates an exemplary virtual computing device 500 for resource sensing for a sidelink operation according to certain embodiments. In certain embodiments, virtual computing device 500 may include modules for performing steps similar to those described above in connection with the method illustrated and described in FIG. 4. For example, the virtual computing device 500 detects resources for an acquisition module 510, an identification module 520, a determination module 530, a selection module 540, a transmission module 550, and a sidelink operation. May include any other suitable modules for. In some embodiments, one or more of the modules may be implemented using the processing circuit 315 of FIG. 3. In certain embodiments, the functions of two or more of the various modules may be combined into a single module.

The acquisition module 510 may perform acquisition functions of the virtual computing device 500. For example, in a particular embodiment, the acquisition module 510 may obtain an indication of resources associated with the first resource pool from the network node. According to certain embodiments, the first resource pool may be for use in exceptional communication.

The identification module 520 may perform identification functions of the virtual computing device 500. For example, in certain embodiments, identification module 520 may identify a triggering event associated with signaling from a network node. In a particular embodiment, the identification module 520 may identify that control of the wireless device 300 is being handed over from the first network node to the second network.

The determination module 530 may perform determination functions of the virtual computing device 500. For example, in certain embodiments, the determination module 530 may determine the need for exceptional communication based on the triggering event.

The selection module 540 may perform selection functions of the virtual computing device 500. For example, in a specific embodiment, the selection module 540 may select a resource from the first resource pool. In a specific embodiment, the selection module 540 may randomly select a resource from the first resource pool while the detection of resources or other additional resources of the first resource pool is performed.

The transmission module 550 may perform transmission functions of the virtual computing device 500. For example, in a specific embodiment, the transmission module 550 may transmit a message using a resource selected from the first resource pool.

Other embodiments of virtual computing device 500 may include additional components other than those shown in FIG. 5, which additional components may include any of the functions described above and/or any additional functions (described above). It may serve to provide certain aspects of the functionality of the wireless device, including any functionality required to support solutions. Various different types of wireless devices have the same physical hardware but may include components configured to support different radio access technologies (eg, through programming), or may represent partially or completely different physical components.

6 illustrates another exemplary method for resource detection for a sidelink operation according to certain embodiments. In an exemplary embodiment, the radio environment may be considered to correspond to a set of exceptional resources to be used in exceptional cases. For example, in case of loss of synchronization for RLF, handover or synchronization criteria (eg, GPS, UE, eNB), exceptional resources may be used.

The procedure illustrated in FIG. 6 begins at step 600 in which the wireless device 300 acquires an exception/communication pool via SIB or dedicated signaling. In step 602, the wireless device 300 begins detecting both the communication pool and the exception pool. In step 604, the wireless device 300 determines whether an exceptional event such as an RLF or handover has occurred. If the event has not occurred, the wireless device 300 selects resources from the communication pool at step 606. Conversely, when an event occurs, the wireless device 300 selects resources from an exceptional pool according to a previously performed detection when the detection is successful. Otherwise, the wireless device 300 maintains sensing or performs a random selection.

Thus, in the exemplary embodiment, the wireless device 300 is required to perform detection of an exceptional pool (ie, pool B), and possibly regular communication pools (ie, pool A). In case of an exceptional event such as RLF or handover, the wireless device 300 may select the most appropriate resources from the exceptional pool without any additional detection procedure.

7 illustrates another exemplary method for detecting resources for a sidelink operation according to certain embodiments. In an exemplary embodiment, the radio environment may be reconsidered as corresponding to a set of exceptional resources to be used in exceptional cases. For example, in case of loss of synchronization for RLF, handover or synchronization criteria (eg, GPS, UE, eNB), exceptional resources may be used.

The procedure illustrated in FIG. 7 begins at step 700 in which the wireless device 300 acquires an exception/communication pool via SIB or dedicated signaling. In step 702, the wireless device 300 determines whether the wireless device has received a mode-1 sensing authorization from the network node. If the wireless device is not configured for mode-1 detection, the method continues to step 704 and no detection is performed in the exception pool. However, if the wireless device 300 is configured for mode-1 sensing, the wireless device 300 starts sensing for the exceptional pool at step 706. In step 708, the wireless device 300 determines if an exceptional event such as an RLF or handover has occurred. When the event has not occurred, the wireless device 300 selects resources according to the mode-1 permission received by the network node in step 710. Conversely, when an event occurs, the wireless device 300 selects resources from an exceptional pool according to a previously performed detection when the detection is successful. Otherwise, the wireless device 300 maintains sensing or performs a random selection.

Thus, in an exemplary embodiment, the exceptional pool is detected only when the wireless device 300 is configured with mode-1 operations by higher layers. In a particular embodiment, for example, the wireless device 300 may begin to detect an exceptional pool upon initiating sending sidelinkUEInformation to a network node to request mode-1 resources. In another embodiment, the wireless device, upon receipt of a mode-1 sidelink grant, may begin to detect an exceptional pool.

8 illustrates another exemplary method for resource detection for a sidelink operation according to certain embodiments. In an exemplary embodiment, the radio environment may be reconsidered as corresponding to a set of exceptional resources to be used in exceptional cases. For example, in case of loss of synchronization for RLF, handover or synchronization criteria (eg, GPS, UE, eNB), exceptional resources may be used.

The procedure illustrated in FIG. 8 begins at 800 at which the wireless device 300 acquires an exception/communication pool via SIB or dedicated signaling. In step 802, the wireless device 300 determines whether an exceptional event such as an RLF or handover has occurred. If no event has occurred, the wireless device 300 selects resources from the communication pool in step 804. Conversely, when an event occurs, the wireless device 300 starts detecting an exception pool in step 806. In step 808, a determination is made as to whether the detection was successful. If the detection is not successful, the wireless device 300 stops detection or performs a random selection in step 810. However, if the detection is successful, the wireless device 300 selects resources from the exceptional pool according to the previously performed detection.

Thus, according to this embodiment, an exceptional pool is detected only when a specific event such as RLF or handover is declared, and the detection must last for a specific configuration time. For example, in the case of a handover, an exceptional pull to be detected may be provided by dedicated signaling via a handover command. In a variation of this example, the wireless device 300 may perform transmission on randomly selected resources while performing detection on the same or different set of specific radio resources. When detection is complete, such as when a timer expires, resources are selected according to the completed detection procedure rather than random.

9 illustrates another exemplary method for detecting resources for a sidelink operation according to certain embodiments. In an exemplary embodiment, the radio environment may be reconsidered as corresponding to a set of exceptional resources to be used in exceptional cases. For example, in case of loss of synchronization for RLF, handover or synchronization criteria (eg, GPS, UE, eNB), exceptional resources may be used.

The procedure illustrated in FIG. 9 begins at step 900 in which the wireless device 300 acquires an exception/communication pool via SIB or dedicated signaling. In step 902, the wireless device 300 determines whether the wireless device has received a mode-1 sensing authorization from the network node. If the wireless device 300 is not configured for mode-1 sensing, the method continues to step 904, where no sensing is performed in the exception pool. However, if the wireless device 300 is configured for mode-1 sensing, the wireless device 300 determines in step 906 whether a measurement event has been triggered. If the measurement event has not been triggered, the method returns to step 904 and no detection is performed in the exception pool. Conversely, if the measurement event has been triggered, the method continues to step 908, and the wireless device 300 starts sensing for an exceptional pool. In step 910, the wireless device 300 determines whether a handover command was received prior to expiration of the timer and whether the detection was successful. Otherwise, the wireless device 300 stops detecting the exceptional pool at step 912. Conversely, when a handover command is received and detection is successful, the wireless device 300 selects resources from an exceptional pool or the wireless device 300 randomly selects according to a previously performed detection.

Thus, according to this embodiment, the wireless device 300 starts to detect the exceptional pool upon triggering of an event, which persists until another event is triggered. In Fig. 9, detection is triggered by a measurement report and is stopped upon receipt of a handover command. If no handover command is received, detection is stopped until a new event is triggered.

10 illustrates another example network node 1000 for detecting resources for a sidelink operation according to certain embodiments. As described above, network node 1000 may be any type of radio network node or any network node that communicates with wireless devices and/or other network nodes. Examples of network node 1000 may include those provided above with respect to network node 215.

The network nodes 1000 may be deployed throughout the network as a homogeneous deployment, heterogeneous deployment, or a mixed deployment. Homogeneous deployment may generally describe an arrangement consisting of network nodes 1000 of the same (or similar) type and/or similar coverage and cell sizes and intersite distances. Heterogeneous deployment can generally describe deployments using various types of network nodes 1000 with different cell sizes, transmit powers, capacities and inter-site distances. For example, the heterogeneous arrangement may include a plurality of low power nodes arranged throughout the macro cell layout. Mixing batches may include mixing homogeneous portions and heterogeneous portions.

The network node 1000 may include one or more of a transceiver 1010, a processing circuit 1020, a memory 1030, and a network interface 1040. In some embodiments, the transceiver 1010 facilitates transmitting wireless signals to and receiving wireless signals from the wireless device 1010 (e.g., via an antenna), and the processing circuit 1020 It is provided by a node and executes instructions for providing some or all of the functions described above, the memory 1030 stores instructions executed by the processor 1020, and the network interface 1040 is a gateway, a switch. , Routers, Internet, Public Switched Telephone Network (PSTN), core network nodes or radio network controllers, etc. and communicate signals with backend network components.

In certain embodiments, the network node 1000 may use multi-antenna technologies and may be equipped with multiple antennas to support MIMO technologies. One or more antennas may have controllable polarization. That is, each element can have two co-located sub-elements with different polarizations (e.g., 90 degree separation as in cross-polarization), so different sets of beamforming weights are different for the emitted wave. Will impart bias.

The processing circuit 1020 may include any suitable combination of hardware and software implemented in one or more modules to execute instructions and manipulate data to perform some or all of the described functions of the network node 1000. have. In some embodiments, the processing circuit 1020 may include, for example, one or more computers, one or more central processing units (CPUs), one or more microprocessors, one or more applications, and/or other logic.

The memory 1030 generally stores instructions such as an application including one or more of a computer program, software, logic, rules, algorithms, code, tables, and/or other instructions that may be executed by a processor. It is possible to operate. Examples of memory 1030 include computer memory (e.g., random access memory (RAM) or read-only memory (ROM)), mass storage media (e.g., hard disk), removable storage media (e.g., compact Disk (CD) or digital video disk (DVD)), and/or any other volatile or nonvolatile, non-transitory computer-readable and/or computer-executable memory devices that store information.

In some embodiments, the network interface 1040 is communicatively coupled to the processor 1020, receives input to the network node 1000, transmits an output from the network node 1000, and input or output Or any suitable device operable to perform appropriate processing of both, communicate with other devices, and perform any combination of the above. Network interface 1040 may include suitable hardware (eg, ports, modems, network interface cards, etc.) and software, including protocol conversion and data processing capabilities, to communicate over a network.

Other embodiments of the network node 1000 may include additional components other than those shown in FIG. 10, which additional components may include any of the functions described above and/or any additional functions (solutions described above). May serve to provide certain aspects of the functionality of a radio network node, including any functionality necessary to support the radio. Various different types of network nodes have the same physical hardware, but may include components configured to support different radio access technologies (eg, through programming), or may represent partially or completely different physical components. Further, the terms first and second are provided for illustrative purposes only and may be interchanged.

11 illustrates an exemplary method 1100 by network nodes 215 and 1000 for providing resources for resource sensing for sidelink operation according to certain embodiments. The method begins at step 1102 in which the network node transmits an indication of resources associated with the first resource pool to the wireless device. The first resource pool contains a subset of all available resources and is intended for use in abnormal communication. In a specific embodiment, the first resource pool is an exceptional resource pool. In certain embodiments, the indication of resources associated with the first resource pool may be transmitted through a system information block or through dedicated signaling.

In certain embodiments, the network node may additionally or alternatively transmit a configuration message to the wireless device specifying the use of mode-1 operation. According to a specific embodiment, resources of the first resource pool may be detected by the wireless device while operating in mode-1.

In step 1104, the network node receives a message from the wireless device using a resource selected from the first resource pool. The message may be received in response to a change in a communication session associated with an abnormal communication as detected by the wireless device. In certain embodiments, for example, a change in the communication session may include a failure of the communication session. In another embodiment, the change in the communication session may comprise a handover of the communication session to the second network node.

In certain embodiments, a method of providing resources for resource sensing for a sidelink operation as described above may be performed by a virtual computing device. 12 illustrates an exemplary virtual computing device 1200 for providing resources for resource sensing for a sidelink operation according to a specific embodiment. In certain embodiments, the virtual computing device 1200 may include modules for performing steps similar to those described above in connection with the method illustrated and described in FIG. 11. For example, the virtual computing device 1200 may include a transmitting module 1210, a receiving module 1220, and any other suitable modules for providing resources for resource sensing. In some embodiments, one or more of the modules may be implemented using the processing circuit 1020 of FIG. 10. In certain embodiments, the functions of two or more of the various modules may be combined into a single module.

The transmission module 1210 may perform transmission functions of the virtual computing device 1200. For example, in a particular embodiment, the transmission module 1210 may transmit an indication of resources associated with the first resource pool to the wireless device. The first resource pool contains a subset of all available resources and is intended for use in abnormal communication. In a specific embodiment, the first resource pool is an exceptional resource pool.

The reception module 1220 may perform reception functions of the virtual computing device 1200. For example, in a specific embodiment, the receiving module 1220 may receive a message from the wireless device using a resource selected from the first resource pool. The message is received in response to a change in the communication session associated with the abnormal communication.

Other embodiments of the virtual computing device 1200 may include additional components other than those shown in FIG. 12, which additional components may include any of the functions described above and/or any additional functions (described above). It may serve to provide certain aspects of the functionality of a network node, including any functionality required to support solutions. Various different types of network nodes have the same physical hardware, but may include components configured to support different radio access technologies (eg, through programming), or may represent partially or completely different physical components.

13 illustrates an exemplary radio network controller or core network node according to a specific embodiment. Examples of network nodes are mobile switching center (MSC), serving GPRS support node (SGSN), mobility management entity (MME), radio network controller (RNC), base station. It may include a controller (BSC) and the like. The radio network controller or core network node 1300 includes a processing circuit 1320, a memory 1330 and a network interface 1340. In some embodiments, the processing circuit 1320 executes instructions to provide some or all of the functions described above as provided by the network node, and the memory 1330 executes instructions executed by the processing circuit 1320. And network interface 1340 is any suitable node such as gateway, switch, router, Internet, public switched telephone network (PSTN), network nodes 115, radio network controllers or core network nodes 1300, etc. And communicate signals.

The processing circuit 1320 executes instructions and manipulates data to perform any suitable hardware and software implemented in one or more modules to perform some or all of the described functions of the radio network controller or core network node 1300. Combinations can be included. In some embodiments, the processing circuit 1320 may include, for example, one or more computers, one or more central processing units (CPUs), one or more microprocessors, one or more applications, and/or other logic.

The memory 1330 generally stores instructions such as an application including one or more of a computer program, software, logic, rules, algorithms, code, tables, and/or other instructions that may be executed by a processor. It is possible to operate. Examples of memory 1330 include computer memory (e.g., random access memory (RAM) or read-only memory (ROM)), mass storage medium (e.g., hard disk), removable storage medium (e.g., compact Disk (CD) or digital video disk (DVD)), and/or any other volatile or nonvolatile, non-transitory computer-readable and/or computer-executable memory devices that store information.

In some embodiments, the network interface 1340 is communicatively coupled to the processing circuit 1320, receives an input to a network node, transmits an output from the network node, and provides an appropriate input or output or both. It may refer to any suitable device operable to perform processing, communicate with other devices, and perform any combination of the above. Network interface 1340 may include suitable hardware (eg, ports, modems, network interface cards, etc.) and software, including protocol conversion and data processing capabilities, to communicate over a network.

Other embodiments of the network node may include additional components other than those shown in FIG. 13, which additional components may include any of the functions described above and/or any additional functions (which support the solutions described above). It may serve to provide certain aspects of the functionality of a network node, including any functionality required for it.

According to certain embodiments, a method by a wireless device for resource sensing is provided. The method includes obtaining, from a network node, an indication of resources associated with a first resource pool. The first resource pool is for use in exceptional communication with other devices. A triggering event associated with signaling from a network node is identified. Based on the triggering event, the need for exceptional communication with other devices is determined. At least one resource is selected from the first resource pool, and a message is transmitted using at least one resource selected from the first resource pool.

According to certain embodiments, a wireless device is provided for resource sensing. The wireless device includes a non-transitory computer-readable medium containing instructions, and processing circuitry configured to execute instructions that cause the wireless device to obtain an indication of resources associated with a first resource pool from a network node. The first resource pool is for use in exceptional communication with other devices. A triggering event associated with signaling from a network node is identified. Based on the triggering event, the need for exceptional communication with other devices is determined. At least one resource is selected from the first resource pool, and a message is transmitted using at least one resource selected from the first resource pool.

According to certain embodiments, a wireless device is configured for resource sensing. The wireless device includes interface circuitry configured to establish a communication session with a network node. The interface circuit is further configured to obtain an indication of resources associated with the first resource pool from the network node. The first resource pool contains a subset of all available resources, and the first resource pool is for use in abnormal communication. The wireless device further includes processing circuitry configured to determine a change in the communication session. Change indicates the need for abnormal communication. The processing circuit is further configured to select a resource from the first resource pool, and the interface circuit is further configured to transmit a message using a resource selected from the first resource pool. The wireless device further includes a power supply circuit configured to supply power to the wireless device.

According to certain embodiments, the UE is configured for resource detection. The UE includes an antenna configured to transmit and receive wireless signals, and a radio front-end circuit coupled to the antenna and processing circuitry. The radio front-end circuit is configured to condition signals communicated between the antenna and the processing circuit. The processing circuitry is configured to establish a communication session with the network node and to obtain an indication of resources associated with the first resource pool from the network node. The first resource pool contains a subset of all available resources, and the first resource pool is for use in abnormal communication. The processing circuitry is configured to determine a change in the communication session, wherein the change indicates a need for abnormal communication, selecting a resource from the first resource pool. The processing circuit is configured to transmit the message using a resource selected from the first resource pool. The input interface is connected to the processing circuit and is configured to allow input of information to the UE to be processed by the processing circuit. The output interface is connected to the processing circuit and is configured to output information from the UE processed by the processing circuit. The battery is connected to the processing circuit and is configured to supply power to the UE.

According to certain embodiments, a wireless device for resource sensing includes a communication module, an acquisition module, a determination module, a selection module and a transmission module. The communication module is configured to establish a communication session with the network node. The acquisition module is configured to acquire an indication of resources associated with the first resource pool from the network node. The first resource pool contains a subset of all available resources, and the first resource pool is for use in abnormal communication. The decision module is configured to determine a change in the communication session, where the change indicates a need for abnormal communication. The selection module is configured to select a resource from the first resource pool, and the sending module is configured to transmit a message using a resource selected from the first resource pool.

According to certain embodiments, a system for resource sensing includes a network node configured to establish a wireless communication session with a wireless device. The network node is also further configured to provide the wireless device with an indication of resources associated with the first resource pool. The first resource pool contains a subset of all available resources, and the first resource pool is for use by the wireless device in abnormal communication. The wireless device is configured to determine a change in the communication session, where the change indicates a need for abnormal communication. The wireless device is further configured to select a resource from the first resource pool and transmit a message using the selected resource from the first resource pool.

Certain embodiments of the present disclosure may provide one or more technical advantages. For example, certain embodiments may eliminate service interruption due to a sensing operation when a wireless device starts to use radio resources belonging to a specific set of radio resources. These radio resources may include a set of resources used only in exceptional cases such as handover, RLF, loss of synchronization or other exceptional cases.

Any steps or features described herein merely illustrate specific embodiments. All embodiments include all the steps or features disclosed, and further, the steps need not be performed in the exact order disclosed or described herein. Further, some embodiments may include steps or features not illustrated or described herein, including steps unique to one or more of the steps disclosed herein.

Any suitable steps, methods, or functions may be performed, for example, through a computer program product that may be executed by the components and equipment illustrated in one or more of the figures above. For example, the storage 230 may include computer-readable means through which a computer program may be stored. The computer program includes instructions that cause the processor 225 (and any operably coupled entities and devices such as interface 235 and storage 230) to execute methods in accordance with the embodiments described above. Can include. Accordingly, a computer program and/or a computer program product may provide a means for performing any of the steps disclosed herein.

Any suitable steps, methods or functions may be performed through one or more functional modules. Each functional module may include software, computer programs, subroutines, libraries, source code, or any other form of executable instructions executed by, for example, a processor. In some embodiments, each functional module may be implemented in hardware and/or software. For example, one or more or all functional modules may be implemented by processors 225 and/or 245, possibly in cooperation with storage 230 and/or 250. Thus, processors 225 and/or 245 and storage 230 and/or 250 allow processors 225 and/or 245 to fetch instructions from storage 230 and/or 250, and fetched instructions Can be configured to enable each functional module to perform any of the steps or functions described herein.

Certain aspects of the inventive concept have been primarily described above with reference to some embodiments. However, as easily understood by those skilled in the art, embodiments other than those disclosed above are equally possible and are within the scope of the concept of the present invention. Accordingly, modifications, additions, or omissions may be made to the systems and devices described herein without departing from the scope of the disclosure. Components of systems and devices may be integrated or may be separate. Also, operations of systems and devices may be performed by more, fewer, or other components. Further, the operations of the systems and devices may be performed using any suitable logic including software, hardware and/or other logic. As used in this document, “each” refers to each member of a set or each member of a subset of the set.

Similarly, many different combinations have been discussed, but not all possible combinations have been disclosed. One of ordinary skill in the art will understand that other combinations exist and are also within the scope of the inventive concept. Further, as will be appreciated by those skilled in the art, the embodiments disclosed herein are equally applicable to other standards and communication systems, and any features from the specific drawings disclosed in connection with other features It can be applied to any other drawing, or can be combined with different features.

Modifications, additions, or omissions may be made to the methods described herein without departing from the scope of the present disclosure. Methods may include more, fewer, or steps. Also, the steps can be performed in any suitable order.

Abbreviations used in the above description include:

3G Third Generation of Mobile Telecommunications Technology

BSM Basic Safety Message

BW Bandwidth

CAM Cooperative Awareness Message

DPTF Data Packet Transmission Format

D2D device-to-device communication

DENM Decentralized Environmental Notification Message

Dedicated Short-Range Communications

eNB eNodeB

ETSI European Telecommunications Standards Institute

LTE Long-Term Evolution

NW Network

RA Resource Allocation

RS Reference Signals

TF Transport Format

SAE Society of the Automotive Engineers

UE User Equipment

V2I Vehicle-to-Infrastructure

V2P Vehicle-to-Pedestrian

V2V vehicle-to-vehicle communication

V2x Vehicle-to-anything-you-can-imagine

wrt with respect to

SPS Semi Persistent Scheduling

DMRS demodulation reference signals

OCC Orthogonal cover code

HO Handover

SIB System Information Block

RLF Radio Link Failure

3GPP Third Generation Partnership Project

RRC Radio Resource Control

PDCCH Physical Downlink Control Channel

PSS Primary Synchronization Signal

SSS Secondary Synchronization Signal

ProSe Proximity Services

MCPTT Mission Critical Push To Talk

WD Wireless Device

RSRP Reference Signal Received Power

Claims (24)

A method 400 for resource detection by a wireless device 210, 300, comprising:
Obtaining, from the network node 215, an indication of resources associated with a first resource pool, the first resource pool for use in exceptional communication with another device;
Acquiring, from the network node 215, an indication of resources associated with a second resource pool, the second resource pool for use in normal communication with the other device;
Identifying, by the wireless device (210, 300), a triggering event associated with signaling from the network node (215);
Based on the triggering event, determining, by the wireless device (210, 300), a need for exceptional communication with the other device;
Detecting resources in at least one of the first resource pool and the second resource pool;
When the detection of the resources is completed, selecting at least one resource from the second resource pool based on the detection of the resources;
Randomly selecting at least one resource from the first resource pool when the detection of the resources is not completed or is not successful; And
Transmitting, by the wireless device (210, 300), a message using the at least one resource selected from the first resource pool
A method comprising (400). The method of claim 1,
Before identifying the triggering event, selecting at least one resource from the second resource pool during normal communication with the other device: And
When the detection of the resources is not completed or is not successful based on the triggering event, stopping the use of the second resource pool for selection of the resource and starting to use the first resource pool
The method further comprising (400). 3. The method (400) of claim 2, wherein the first resource pool comprises a first plurality of resources and a second plurality of resources, the first plurality of resources being a subset of the second plurality of resources. The method of claim 2, wherein the step of identifying the triggering event comprises determining that the first resource pool has a better reference signal received power (RSRP) than the second resource pool ( 400). 3. The method (400) of claim 2, wherein identifying the triggering event comprises determining that the first resource pool is less congested than the second resource pool. The method of claim 2,
When the detection of the resources is completed, the step of selecting the at least one resource from the second resource pool based on the detection of the resources,
And reselecting the at least one resource selected prior to the triggering event (400). 2. The method (400) of claim 1, further comprising continuing to randomly select resources from the first resource pool until a timer expires. The method of claim 1,
Further comprising the step of receiving an eNodeB-scheduled resource configuration message from the network node 215,
Resources of at least one of the first resource pool and the second resource pool are detected in response to the eNodeB-scheduled resource configuration message (400). 9. A method (400) according to any of the preceding claims, wherein identifying the triggering event comprises detecting a change in a communication session. Method according to any of the preceding claims, wherein the triggering event comprises a handover of the wireless device (210, 300) from a first network node (215) to a second network node (215a) ( 400). 9. A method (400) according to any of the preceding claims, wherein the indication of the resources associated with the first resource pool is obtained through a system information block. 9. A method (400) according to any of the preceding claims, wherein the indication of the resources associated with the first resource pool is obtained through dedicated signaling. As a wireless device (210, 300) configured for resource detection,
A non-transitory computer-readable medium 330 containing instructions; And
Processing circuitry (315) configured to execute the instructions
Including,
The instructions cause the wireless device (210, 300),
Obtain, from the network node 215, an indication of resources associated with a first resource pool-the first resource pool is for use in exceptional communication with other devices -,
Obtaining, from the network node 215, an indication of resources associated with a second resource pool-the second resource pool is for use in normal communication with the other device -,
To identify a triggering event associated with signaling from the network node 215,
Based on the triggering event, to determine the need for exceptional communication with the other device,
To detect resources in at least one of the first resource pool and the second resource pool,
When the detection of the resources is completed, selecting at least one resource from the second resource pool based on the detection of the resources,
When the detection of the resources is not completed or is not successful, at least one resource is randomly selected from the first resource pool,
A wireless device (210, 300) for transmitting a message using the at least one resource selected from the first resource pool. delete delete delete delete delete delete delete delete delete delete delete

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